The charge flowing through a light bulb attached to a 12-V battery in 14.0 s is 30.0 C.What is the average power supplied by the battery during this process?

A) 360 W
B) 12 W
C) 25.7 W
D) 5.6 W
E) 30 W

Question

The charge flowing through a light bulb attached to a 12-V battery in 14.0 s is 30.0 C.What is the average power supplied by the battery during this process?
​
A) 360 W
B) 12 W
C) 25.7 W
D) 5.6 W
E) 30 W

Quizplus · Accepted Answer

The power supplied by the battery can be calculated using the formula P = V*I, where V is the voltage of the battery and I is the current flowing through the circuit. 
The current can be calculated using the formula I = Q/t, where Q is the charge flowing through the circuit and t is the time taken. 
Substituting the given values, we get I = Q/t = 30.0 C/14.0 s = 2.14 A. 
Now we can calculate the power supplied by the battery as P = V*I = 12 V*2.14 A = 25.7 W.
Therefore, the correct answer is choice C.

The Charge Flowing Through a Light Bulb Attached to a 12-V